a*****g
发帖数: 1320 | 1 1) What is the units digit of N in the following equation?
（3x3x3x3x3）/N =1/2 X 1/3 X 1/3
2) A rectangle with sides of length 5 units and 6 units that are parallel to
the x-axis and y-axis has one vertex at (1,3). What is the largest possible
sum of the coordinates of any of the other vertices of this rectangle? |
m*********y
发帖数: 1735 | 2
N=(3*3*3*3*3)/(1/2*1/3*1/3)=3^7*2
3*3=9
3*9=27
3*27=81
3*81=243
个位以4为周期循环，所以3^7等于3^3的各位，就是7，乘以2，个位就是4
to
possible
矩形左下角是（1，3）时右上角坐标之和最大，所以右上角是（6，9），之和是15
【在 a*****g 的大作中提到】
: 1) What is the units digit of N in the following equation?
: （3x3x3x3x3）/N =1/2 X 1/3 X 1/3
: 2) A rectangle with sides of length 5 units and 6 units that are parallel to
: the x-axis and y-axis has one vertex at (1,3). What is the largest possible
: sum of the coordinates of any of the other vertices of this rectangle?
|
a*****g
发帖数: 1320 | 3 太感谢了。你解题的思路非常的清晰，简单明了，俺发自心底的葱白。
【在 m*********y 的大作中提到】
:
: N=(3*3*3*3*3)/(1/2*1/3*1/3)=3^7*2
: 3*3=9
: 3*9=27
: 3*27=81
: 3*81=243
: 个位以4为周期循环，所以3^7等于3^3的各位，就是7，乘以2，个位就是4
: to
: possible
: 矩形左下角是（1，3）时右上角坐标之和最大，所以右上角是（6，9），之和是15
|
B******1
发帖数: 9094 | |
